from Clinical/Therapeutic Issues
Dr. Lippa says that his survey of more than 3,500 men and women showed that 0.3% of men were attracted to their own sex; 8% of the women surveyed were attracted to other women. In an interview with the London Independent, Lippa said, "Sexuality is more complex than we want to believe. It is more common for women to change their sexuality. My personal sense is that there are very few bisexual men, but there are significantly more bisexual women out there."
Lippa believes that women who have a high sex drive are more likely to be attracted to both men and women. In fact, he says that women are 27 times more likely than men to become attracted to their own sex.
The Independent reported that a BBC sex survey conducted in 2005 indicated that there are twice as many bisexual women (6%) as there are lesbian women (3%) in the UK. In addition, the numbers of women engaging in lesbian sex more than doubled between 1990 and 2000.